Magnite is trading at $21.37, down 4.73%, with no clear company-specific announcement explaining the October 29 after-hours decline.

  • Magnite had announced an October 14 LG Ad Solutions partnership extension; that earlier news does not explain this move.
  • After Alphabet’s earnings renewed concerns about AI spending, Reuters reported the Nasdaq fell and software stocks broadly weakened. This sector backdrop may have contributed, but no direct link to Magnite was reported.